Box mold



P. H. HINKEL July 9, 1929.

BOX HOLD um aan. e, 192e 2 Sheets-Sheet 2 INVENTOIL wir. fd-1 A TTURNEYS.

Patented July 9, 1929.

UNITED STATES PATENT OFFICE.

PAUL E. HENKEL, F ERIE, PENNSYLVANIA, ASSIGNOR T0 CONTINENTAL RUBBERWORKS, 0F ERIE, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

BOX MOLD.

Appli-cation filed January The invention is designed'to provide a meansthrough which boxes formed of plastic material may be supplied with anopening which may be closed by a transparent plate. In many containers,such as battery boxes, it is desirable to have a means for indicatingthe condition ot the battery liquids and such a transparent Wall makesthis possible. Features and details ot the invention will appear Jfromthe specification and claims.

A preferred embodiment ot' the invention is illustrated in theaccompanying drawings as follows Fig. 1 shows a side elevation, partlyin section, of a ress for forming a box.

Fig. 2 a p an view of the plate and the mold.

Fig. 3 a side elevation of one of the mold plates. f

Fig. 4 a section on the line 4 4 in Fig. 3.

Fig. 5 a perspective view of the mold plates partly separated showing abox 1n place therein.

Fig. 6 a view of the mold plates with a part partially removed.

Fig. 7 a similar view with this part completely removed.

Fig. 8 a detached perspective View of a 3U mold part.

Fig. 9 a plan view of a box wall.

Fig. 10 a section on the line 10-10 1n FigQll.

Fig. 11 an elevation of one of the sides of the box.

1 marks the press base, 2 the ram cylinder, 3 the ram, 4 the ram laten,5 the mold comprising a mold cav1ty, 6 passages in the platen forcooling, or heating fluid, a

cavity in the mold walls communicating with the cavity 6, 8 a presshead, 9 straining rods running from the base to the head, 10 mold cores,11 passages through the cores for heatingpor cooling fluid, 12 a.hydraulic '45 cylinder on the head, 13 a pipe supplying Huid to thecylinder 12, 14 a piston in the cylinder, 15 a thrust rod extendingAtrom the piston against the mold, 16 a bottom plate of a mold liningsystem, 17 side plates of such a system, the bottom plate having asurrounding groove 18 receiving tongues 19 in the lower edges of theside plates. The bottom plate has a knock-out pin 20 which is adapted toengage a stop 21 slidingly mounted in the frame. The stop slide is 6,1928. Serial No. 244,842.

operated by a lever 22, the slides being con. nected by a` rod 23. Theseparts are, or may be, so tar as described substantially the salue as theparts shown and described in the patent to John F. Allen, #1,549,177,Aug. 11, 1925.

'It is desired to form one wall 24 of a battery box with an opening 25therethrough and with a surrounding slot 26, the sides ot thc slothaving channels 27, this slot and channels extending through the topwall of the box so that a glass plate 28 may be dropped into the slotand sealed therein. A rib 25a may surround the opening 25.

An opening forming projection 29 extends inwardly from a plate 17a. Itis of a contour to form the opening 25 and of sufficient length tocontact the wall of the core when the core is in the mold cavity.Grooves 30 are formed in the plate, which grooves are adapted to formthe ribs 25a.

A slot forming plate 31 has an opening 32 through it. This plate isplaced over the projection 29. It has the side pins 33 which extendupwardly beyond the top` of the slot forming plate 31. These pins extendinto openings 34: in a guide block 35. The guide blpck is slidinglymounted in a slot 36 in the top of the plate 17". It is held in itsposition in the slot by tongues 37 operating in grooves 38.

In operation the plates are assembled in a manner similar to the Allenpatent but in setting up the plate 17u the slot forming plate 31 isplaced over the projection 29 and the guide block pushed down over thepins 33. Thus the guide block definitely locates and holds the plate 31relatively to the projection 29. With this plate 17EL so assembled andthe other lining plates in position the material is placed in the moldas with the Allen structure and the mold is closed, the core acting onthe inserted plastic material in the mold forcing it under very highpressure into all parts of the mold and chilling it with some plasticmaterials, or heating it to vulcanize it where other material, such aswhen rubber, is used. As soon as the box becomes suiciently hard 'themold is stripped from the core and the 1ining stripped from the moldthrough the action ot' the push rod 15. The guide block 35 is thenwithdrawn, the plate 17a is laid down, withdrawing the projection 29from the opening 25 and the opening 32 in the slot forming plate 31. Theslot forming late can then be withdrawn from the box eaving a slotentirely around the opening which slot 'extends through the top of thebox. With such a box the glass plate 28 may be dropped into place andthe sealing material introduced around the slot and into theenlargements 27, thus completely closing the box with a transparentportion.

What I claim as new is 1. In a box mold, thev combination 'of a moldplate; an opening forming projection on the plate; and a slot formingplate through which the projection extends.

2.'In a box mold, the combination of a mold plate; an opening formingprojection on the plate; a slot forming plate through which theprojection extends; and a guide block secured to the plate and to whichthe slot forming late is secured.

3. In a box moldyt e combination of a mold plate; v an opening formingprojection on the plate; a slot forming plate through which theprojection extends; and a guide block removably secured to the plate andto which the slot forming plate is sey cured.

.tion on 4the plate; a slot forming 4. In a. box mold, the combinationof a mold plate; an opening forming projection on the plate; a slotforming plate through which the projection extends; and a guide blocksecured to the plate and to which the slot forming plate is removablysecured. v

5. In a box mold, the combinationof a mold plate; an opening formingprojection on the late; a slot formin plate through which t e projectionexten s; and a guide block removably secured tothe plate and to whichthe slot forming plate is removably secured.

- 6. In a box mold, the combination of a mold plate; an opening formingprojecplate through Whichthe projection exten s'; and

channel forming pins at the sides of the slot forming plate.

7. Ina box mold,-the combination of a mold plate; an opening formingprojection -on the plate; a slot forming plate through which theprojection extends; channel forming pins at the sides of the slotforming plate; and a guide block into whichthe pins extend.

rmold having a mold cavity; a mold plate against the wall of the cavity;an opening forming projection on the plate; and a slot forming platethrough which the projection extends.

10. In a box mold, the combination of a mold having a .mold cavity; amold plate against the wall of the cavity; an opening forming projectionon the plate; a slot forming plate through which the projection extends;and channel forming pins on the sides of the slot formin plate.

11. In a box mold, t e combination of a mold having a mold cavity; amold plate against the wall of the cavity; an opening forming projectionon the plate; a slot forming plate through which the projection extends;and a guide block movably secured 'on the plate and to which the slotforming plate is secured.

12. In a box mold, the combination of a mold having a mold cavity; amold lining formed of plates comprising a bottom plate and side plates,one of the side plates having an opening forming projection thereon; aslot ormin plate through which the projection exten s; a core adapted toenter the assembled lining; and means for stripping the lining from themold.

13. In a box mold, the combination of a mold havin a mold cavity; alining plate in the moldaving an opening forming projection therein; andmeans operating in connection with the projection forming a surroundingslot around the opening formed by the projection.

14. In a box mold, the combination of a side plate; means for completingthe mold cavit an opening forming projection on the slde plate; and aslot forming means extending from the topof the mold cavity around theprojection.

In testimony whereof I have hereunto set m hand.

y PAUL H. HENKEL.

